No Hot air..

[anonymous-user]

Out today all running well heater on and lots of hot air, stop in traffic and within 30 secs its blowig cool to cold air from vents, move off and heat is back very quickly. Did this 2-3 times and all gauges are showing correctly. Whats going on ??

[Harrytsg]

Dumb question first, is the water level ok, including the swirl pot?

[anonymous-user]

Dont know about swirl pot but level is as usual in one at front.

[Harrytsg]

The swirl pot is the aluminium vessel with the brass blank in the top, (when cold) check the level there, it should be full, or as near as.

[Chuffmeister]

Sounds like possibly low on coolant or an airlock in the system perhaps. As above, start by checking the coolant levels.

[anonymous-user]

Ta will have a look this weeek.

[anonymous-user]

Today have put half pint in swirl pot to brim it and filled expansion tank to one inch from top, ran up to temp fans coming on and heater control working fine- cold when closed and heat when opened up, lovely.
Switched off let all go cool, felt expansion tank and its stone cold !! pipe from here going across front of engine bay is warm, is this normal ??

[jojackson4]

You may find that you get some water out of the exp bottle that full
The bottle will only get warm when the water expands

[Chuffmeister]

The standard thermostat opens at 82 degrees, to the water needs to be hot to open the thermostat and circulate the water.